AMD has announced its latest high-end GPUs, the Radeon RX 7900 XT and Radeon RX 7900 XTX, built employing multiple scalable "chiplets" which have been manufactured using a 5nm fabrication process and based on the all-new RDNA 3 architecture.
Beginning on December 13, both graphics processor units will be available globally. AMD claims that the new GPUs will offer up to 70% better performance or 54% higher performance per Watt than their previous generation, which was based on the RDNA 2 architecture.
AMD Radeon RX 7900 XTX, Radeon RX 7900 XT features
The new Radeon RX 7900 XTX competes with NVIDIA's GeForce
RTX 4000 series and packs 96 compute units, a clock speed of up to 2.3GHz, and
24GB of GDDR6 RAM. The total board power consumption is estimated to be 355W.
The slightly cheaper Radeon RX 7900 XT includes 20GB of GDDR6 RAM, 84 CUs, and
a 2GHz clock speed. This model uses 300W of power.
For both variants, AMD's promotional photos show two
standard 8-pin PCIe power connectors in addition to DisplayPort, HDMI, and USB
Type-C for visual outputs. Partner brands will have the option to alter their
product offerings.
Both of the Radeon RX 7900 series devices that have been
officially unveiled support DisplayPort 2.1 for outputs of up to 8K at 165Hz or
4K at 480Hz. Additional features include simultaneous encode/decode with the
AVC and HEVC codecs, hardware-level support for up to 8K 60fps AV1 encoding,
and more.
The traditional monolithic GPU has been divided into
numerous Memory Cache Dies (MCDs) and a Graphics Compute Die (GCD), which
contains the compute units that make up the graphics rendering pipeline. In
comparison to the Radeon RX 7900 XT, which has five active MCDs and a bus width
of 320 bits, the Radeon RX 7900 XTX features six MCDs, each on a 64-bit wide
bus, totaling 384 bits. The MCDs are produced using a 6nm process, whilst the
GCDs are fabricated on a 5nm node, allowing AMD to combine and match components
to optimise manufacturing resources and costs.
As a result of new AI instructions and increased throughput,
AMD claims that ray tracing is now 50% faster than it was with the previous
generation. Different stages of the graphics pipeline can now operate at
various clock speeds, compute units can now dual-issue instructions, and
additional AI accelerators have been introduced to each CU. It is expected that
additional performance details, including competitive positioning against
NVIDIA's GeForce RTX 4000-series products and the new Intel Arc GPUs, will be
revealed soon.
The company claims that its version of the next-generation
Infinity Cache has 2.7X more bandwidth than the previous generation, thanks to
enhanced algorithms. Additionally, the business claims that in the interest of
power efficiency, it has lingered on with GDDR6 RAM.
In addition, AMD is releasing many updates to its software
suite to enable the new graphics cards, including AMD FidelityFX Super
Resolution (FSR) 2.2, AMD FSR 3, AMD HYPR-RX, New AMD RDNA 3 Media Engine, and
Improved Video Recording and Streaming.
AMD Radeon RX 7900 XTX, Radeon RX 7900 XT price,
availability
The premium high-end Radeon RX 7900 XTX has been priced at
$999, while the one positioned one step below it, the Radeon RX 7900 XT, will
cost $899.
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